Interactive Modeling of Implicit Shapes From Sketches. - Ileana Anca Alexe; Véronique Gaildrat (VMV, 2003)

Interactive modelling from sketches using spherical implicit functions. - Ileana Anca Alexe; Véronique Gaildrat; Loïc Barthe (Afrigraph, 2004)

Shape modeling by sketching using convolution surfaces. - Ileana Anca Alexe; Loic Barthe; Marie-Paule Cani; Véronique Gaildrat (SIGGRAPH Courses, 2007)